hgext3rd/topic/discovery.py
author Pierre-Yves David <pierre-yves.david@octobus.net>
Wed, 23 May 2018 01:24:02 +0200
changeset 3762 cd194eb336bd
parent 3689 415c872d3308
child 3917 ca7f02c9fa57
permissions -rw-r--r--
branching: merge with stable
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from __future__ import absolute_import
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import collections
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import weakref
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from mercurial.i18n import _
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from mercurial import (
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    bundle2,
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    discovery,
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    error,
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    exchange,
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    extensions,
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    util,
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)
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try:
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    from mercurial import wireproto
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    wireproto.branchmap
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except ImportError: # <= hg-4.5
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    from mercurial import wireprotov1server as wireproto
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def _headssummary(orig, pushop, *args, **kwargs):
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    # In mercurial > 4.3, we receive the pushop as arguments
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    repo = pushop.repo.unfiltered()
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    remote = pushop.remote
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    publishing = ('phases' not in remote.listkeys('namespaces')
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                  or bool(remote.listkeys('phases').get('publishing', False)))
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    if ((publishing or not remote.capable('topics'))
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            and not getattr(pushop, 'publish', False)):
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        return orig(pushop, *args, **kwargs)
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    publishedset = ()
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    remotebranchmap = None
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    origremotebranchmap = remote.branchmap
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    # < hg-4.4 do not have a --publish flag anyway
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    if util.safehasattr(pushop, 'remotephases'):
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        publishednode = [c.node() for c in pushop.outdatedphases]
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        publishedset = repo.revs('ancestors(%ln + %ln)',
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                                 publishednode,
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                                 pushop.remotephases.publicheads)
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        rev = repo.unfiltered().changelog.nodemap.get
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        def remotebranchmap():
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            # drop topic information from changeset about to be published
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            result = collections.defaultdict(list)
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            for branch, heads in origremotebranchmap().iteritems():
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                if ':' not in branch:
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                    result[branch].extend(heads)
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                else:
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                    namedbranch = branch.split(':', 1)[0]
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                    for h in heads:
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                        r = rev(h)
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                        if r is not None and r in publishedset:
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                            result[namedbranch].append(h)
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                        else:
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                            result[branch].append(h)
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            for heads in result.itervalues():
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                heads.sort()
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            return result
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    class repocls(repo.__class__):
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        # awful hack to see branch as "branch:topic"
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        def __getitem__(self, key):
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            ctx = super(repocls, self).__getitem__(key)
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            oldbranch = ctx.branch
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            rev = ctx.rev()
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            def branch():
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                branch = oldbranch()
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                if rev in publishedset:
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                    return branch
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                topic = ctx.topic()
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                if topic:
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                    branch = "%s:%s" % (branch, topic)
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                return branch
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            ctx.branch = branch
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            return ctx
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        def revbranchcache(self):
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            rbc = super(repocls, self).revbranchcache()
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            changelog = self.changelog
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            def branchinfo(rev):
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                branch, close = changelog.branchinfo(rev)
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                if rev in publishedset:
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                    return branch, close
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                topic = repo[rev].topic()
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                if topic:
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                    branch = "%s:%s" % (branch, topic)
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                return branch, close
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            rbc.branchinfo = branchinfo
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            return rbc
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    oldrepocls = repo.__class__
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    try:
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        repo.__class__ = repocls
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        if remotebranchmap is not None:
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            remote.branchmap = remotebranchmap
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        unxx = repo.filtered('unfiltered-topic')
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        repo.unfiltered = lambda: unxx
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        pushop.repo = repo
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        summary = orig(pushop)
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        for key, value in summary.iteritems():
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            if ':' in key: # This is a topic
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                if value[0] is None and value[1]:
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                    summary[key] = ([value[1][0]], ) + value[1:]
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        return summary
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    finally:
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        if 'unfiltered' in vars(repo):
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            del repo.unfiltered
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        repo.__class__ = oldrepocls
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        if remotebranchmap is not None:
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            remote.branchmap = origremotebranchmap
1886
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def wireprotobranchmap(orig, repo, proto):
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    oldrepo = repo.__class__
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    try:
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        class repocls(repo.__class__):
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            def branchmap(self):
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                usetopic = not self.publishing()
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                return super(repocls, self).branchmap(topic=usetopic)
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        repo.__class__ = repocls
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        return orig(repo, proto)
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    finally:
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        repo.__class__ = oldrepo
1887
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# Discovery have deficiency around phases, branch can get new heads with pure
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# phases change. This happened with a changeset was allowed to be pushed
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# because it had a topic, but it later become public and create a new branch
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   135
# head.
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   136
#
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# Handle this by doing an extra check for new head creation server side
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   138
def _nbheads(repo):
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    data = {}
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    for b in repo.branchmap().iterbranches():
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        if ':' in b[0]:
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            continue
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        data[b[0]] = len(b[1])
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    return data
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   145
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def handlecheckheads(orig, op, inpart):
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    """This is used to check for new heads when publishing changeset"""
1887
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    orig(op, inpart)
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    if op.repo.publishing():
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        return
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    tr = op.gettransaction()
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    if tr.hookargs['source'] not in ('push', 'serve'): # not a push
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   153
        return
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    tr._prepushheads = _nbheads(op.repo)
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    reporef = weakref.ref(op.repo)
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   156
    oldvalidator = tr.validator
1921
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   157
1887
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   158
    def validator(tr):
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   159
        repo = reporef()
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   160
        if repo is not None:
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   161
            repo.invalidatecaches()
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   162
            finalheads = _nbheads(repo)
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   163
            for branch, oldnb in tr._prepushheads.iteritems():
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   164
                newnb = finalheads.pop(branch, 0)
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   165
                if oldnb < newnb:
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   166
                    msg = _('push create a new head on branch "%s"' % branch)
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diff changeset
   167
                    raise error.Abort(msg)
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diff changeset
   168
            for branch, newnb in finalheads.iteritems():
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   169
                if 1 < newnb:
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   170
                    msg = _('push create more than 1 head on new branch "%s"'
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   171
                            % branch)
1887
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   172
                    raise error.Abort(msg)
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diff changeset
   173
        return oldvalidator(tr)
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   174
    tr.validator = validator
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   175
handlecheckheads.params = frozenset()
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diff changeset
   176
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   177
def _pushb2phases(orig, pushop, bundler):
2673
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   178
    checktypes = ('check:heads', 'check:updated-heads')
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   179
    hascheck = any(p.type in checktypes for p in bundler._parts)
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   180
    if not hascheck and pushop.outdatedphases:
1887
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   181
        exchange._pushb2ctxcheckheads(pushop, bundler)
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   182
    return orig(pushop, bundler)
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diff changeset
   183
1903
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   184
def wireprotocaps(orig, repo, proto):
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   185
    caps = orig(repo, proto)
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   186
    if repo.peer().capable('topics'):
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   187
        caps.append('topics')
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diff changeset
   188
    return caps
1944
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diff changeset
   189
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   190
def modsetup(ui):
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diff changeset
   191
    """run at uisetup time to install all destinations wrapping"""
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diff changeset
   192
    extensions.wrapfunction(discovery, '_headssummary', _headssummary)
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diff changeset
   193
    extensions.wrapfunction(wireproto, 'branchmap', wireprotobranchmap)
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diff changeset
   194
    extensions.wrapfunction(wireproto, '_capabilities', wireprotocaps)
2676
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diff changeset
   195
    # we need a proper wrap b2 part stuff
1944
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diff changeset
   196
    extensions.wrapfunction(bundle2, 'handlecheckheads', handlecheckheads)
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diff changeset
   197
    bundle2.handlecheckheads.params = frozenset()
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diff changeset
   198
    bundle2.parthandlermapping['check:heads'] = bundle2.handlecheckheads
2676
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diff changeset
   199
    if util.safehasattr(bundle2, 'handlecheckupdatedheads'):
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diff changeset
   200
        # we still need a proper wrap b2 part stuff
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diff changeset
   201
        extensions.wrapfunction(bundle2, 'handlecheckupdatedheads', handlecheckheads)
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diff changeset
   202
        bundle2.handlecheckupdatedheads.params = frozenset()
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diff changeset
   203
        bundle2.parthandlermapping['check:updated-heads'] = bundle2.handlecheckupdatedheads
1944
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parents: 1934
diff changeset
   204
    extensions.wrapfunction(exchange, '_pushb2phases', _pushb2phases)
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diff changeset
   205
    exchange.b2partsgenmapping['phase'] = exchange._pushb2phases